Plunger.



A. OHMISTBDE.4

PLUNGBR. APPLICATION FILED 11136.31, 1911.

Patented Feb.27,1912.

ff' me@ Witnesses Attorneys 'Beaun'iont, in the county ol Jede-.reen

llletlln AUGUST QHMSTED, GFBEAUMQNT, TEXAS, ASSIGNOE.. 0F ONEeHALF TO BELL, OF BEAUMONT, ms.

:BRAiJLEY W.

ELUNGEBt To all tzr/lam. it may Concern Be it known that l, AUGUST OHMSTEDE, a citizen of the United States, residing at and and is a State of Texas, hare invented a new useiiul lllunger, of which the following specification.

This invention relates to plungers or pistons, which are employed to reciprocate in the cylinders of pumps, air-comi'iressors, and the like, and this invention has Jfor its principal object to :provide a tight sliding lit between the plunger and the cylinder in which it is made to reciprocate. The comnion construction of plungers of this character includes a packing of leather, or other pliable material, on the sliding face of the plunger whic. forms a smooth and tight sliding tit between the plunger and cylinder.

A further object is to provide means for expandinor the packing from the exterior of the cylin er.

Another object is to provide means for e3'.- panding the packing equally along the whole length thereof, as is preferable.

` rihis inrention is embodied in a novel construction, arrangement and combination of parts, as will be hereinafter set forth in the.

appended claim.

shaped packing ll of pressed leather or other suitable material, which is mounted on a plunger rod or stein 7, the side of' the said packing being shaped to contorni with the inside of the cylinder, and means are pro# vided for expanding the sides of the said cup-shaped packing to forni a snug tit with the cylinder. The nie-ans for mounting the said packing 9 and the means for expanding the said packing 9 will he described presently. The longitudinal plunger rod 7 has its lower end passing through the end of the Speceaton of Letters Patent.

Application filed August 31, 19H.

Fatented Fel). 9"?, 1%12.,

Serial No. 61-7 ,0&7.

cup-shaped packing 9, and has the lower end thereof externally screw-threaded. The respective washers 10 and 11 on the said plunger rod on the outer and inner faces of the end ot the cup-shaped packing 9 clamp the said end securely therebetween by means of the nuts 12 and 13, as will be understood. ln this manner the said packing 9 is secui'ed to the lower end of the plunger rod. The upper end of the plunger rod 'l' is externally screw-tlneatlcd and passes through a handle S, the nuts 16 and 17 on the top and bottom, respectively, of the handle, clamping the said handlD in position. A longitudinal passage ll extends through the plunger rod 7, and a spindlev l5 has a sliding fit therein and protrudes out both ends of the plunger rod, the ends Ythereof being externally Serewthreaded.

Vlithin the cup-shaped packing 9 is a ring lifting snugly on the innler Side thereof, and which is split longitudinally at several points around the periphery thereof to forni several disconnected sections capable of radial movement. At the lower end this ring 25 has an outward tapered seat E26 on the inner side thereof, and a spreader 2l haring an inward tapered face engages in the said seat 26. boss 22 depends from the said spreader 2l and the lower end of the spindle passes through a hole 27 in the said boss. A nut Q3 on the lower end of the spindle supports the spreader Q1. on the lower end of the' spindle 15. A plurality of holes Q/l'pass through the spreader from the top to the bottom thereof. Thus, when the spindle l5 is raised, the spreader is drawn upward or into the cup-shaped packing thereby radially spreading the .sections of the ring to expand the side of the cup shaped packing l). lt will be seen that the ringo is expanded equally along its longitudinalgportions, and therefore equally expanding the packing along the length thereof 'to compensate or any Wear thereof. Tli holes 24 are provided to permit the escape of the air from within the cup-sliaped packing 9 upon the spreader being forced inwardly or upwardly therein, and thus allow the spreader to more freely to and from the interior ot the cup-shaped packing.

At the upper end of the plunger rod 7 is a stuffing box 28 and a gland nut 18 which closes the passage let, thus preventing the 3s-mp0 ofi? air oi' iilid iii'ioroihroiiggh. The apindio l5 passing through thoglami nut 1S has the upper Lut 19 on the thi'eaded poi'iioii izheiooif and a ooilozi spring 20 if; Qompiosiby dispoaed boiwoou ih@ said nut if.) und ibo gland 1S to give in upii'm-i ion- Sion to the Spindi l5, and ihm; yioiiiigiy Tend to uutfmmtimliy iaio the spifeafier 2 io ofipniui tho pff-king This tension Cam 'be ioguin'od by' lidjusiimmf? the nui i9. Thus., rowing Hue mit 19 inwad the tension spindle nmy be increased to giifo :in i expzmsivo e'roi', and vice Versa. 'iimiily the hoodie 53 located ouifsido miler '6, the piungor `fod passing through in@ hond. of 'theY oj/iuoior, as is oomjmon iii hand bicyolo and automobile 'tiro pompa. By/lmvmg ibo Spindio out of iho will ;'lmigor rod, 'the plunger may be mi flo/ izom 'Without the cylinder.

In use, those, phmgers me adapte@ io compi'oss the :ii' :el the iowo and of the cylinfflol, boiow die phmgor, and it will bo Seen @mi ibo obiccio aimed at havo been attained in an. oiioient, Simpio and. oon'vonioii; man

:moin

The invoiiiion is @op ilo of alterations wtiiiittho scopo of tio Qpeiiod daim, and

withoui; dopo :iiig 'iom the spirit of iii@ iii- Yeniioi.

Having dosoi'ibed claim as new is:

rhe Combination tho invoni-i'min2 what :i

of :i plunge? 'oci, a, Spinde passing thoo'fhioughg a cup-.shaped paokiiig mount-od on one @mi of dio giungo? Kod, the plunge? rol having a Stuiiiiiq nbox in tho oi'hei* end tiiorei'yf, :i bandi@ on 'he intei and of 'the piuigoi' rod, a spiii. :ring fio zing snugly Wihn the. packing sind having on inner mpeiod sont, @Spreader having a apoiod foco engaging tho said seat, on@ and of; the spindle being'p., d through he Said.

sp todo?, n, nui: mimi-threaded upon the sin@ fend of the spindle, a gland nn, for die Said stuffing box, a, mit soioiitheadod upon A' othei omi oi die Spindle, and :i compi'ossion spring disposed between the latter nut amd the ginnici out, and for tho purpose sot forth.

i testimony tim daim ih@ foregoing .as my' o'wii7 I have hereto aixod my Signw m1-o in h@ pi'esoiioo of two Witness "Witnosgos B. Loomrf, "W, lvl, @Rooyl 

